MICROFICHE REFERENCE LIBFUUW - Cd3wd.com
MICROFICHE REFERENCE LIBFUUW - Cd3wd.com MICROFICHE REFERENCE LIBFUUW - Cd3wd.com
63The IRRI design has a handle bar which serves as both a supportwhile pumping and a handle for carrying the 45 lb pump. It is easy torepair and simple enough for small machine shops to construct. Designdrawings are given free of cost to manufacturerswho agree to IRRI con-ditions. Although this design is expected to be rugged for a longservice life, additional work is being done to improve its presentdurability (Kuether, 1975). No cost estimates were available and normalmaintenance consists of canvas repair after about 175 hours of use. Theperformance of this pump is reported (IRRI, 1975) as:40 gpm at 1.6 ft head32 gpm at 3.3 ft head29 gpm at 5.0 ft headThis, of course, will vary depending on the operator.The second form of diaphragm pumps is similar in operation to thepiston pump, however, as shown in Figure 3.16, the diaphragm is attachedto both the piston and the cylinder. This has the advantage of removingthe sliding friction between piston and cylinder wall. In addition,since the piston only serves to reciprocate the diaphragm, abrasive fluids,e.g. sandy water, can be pumped without wearing the piston and cylinderwalls.The common forms of dianh+aum r-- -=--pi55 ton pumps are opG, --ted -in- eitherof two ways. The piston can be reciprocated by a mechanical driver (e.g.gas or diesel engine), or for smaller capacities by hand or foot levelmechanisms (Figure 3.30) . The other method, is to utilize compressed airor hydraulic pressure on one side of the diaphragm to push it down and thenallow a spring loaded piston to pull it us. The pneumatic or hydraulicpressure is automatically regulated to provide the reciprocating motion(e.g. by a solenoid valve and regulator).
HANDLE/CONNECTINGARMDISCHARGEFLAP VALVE/ nDIAPHRAGMIINLET FLAPVALVEUCTION LINECONNECTIONFigure 3.16 Diaphragm pump with handle-lever for manual operation
- Page 20 and 21: Chapter 2Water LiftingPrinciples2.1
- Page 22 and 23: 15Table 2.2a Classification of wate
- Page 24 and 25: 2.2.1 Discharge or Capacity (Q)Disc
- Page 26 and 27: (h) Drawdown (D) is the vertical di
- Page 28 and 29: 21Tota I DynamicHeadI Total Static
- Page 30 and 31: 23Vapor Pressure (P,)Suction Fricti
- Page 32 and 33: Multiplying all these efficiencies
- Page 34 and 35: 27NPSHR-Q, is also usually included
- Page 36 and 37: 3.2.1.1 Bucket/BagUtilizing nothing
- Page 38 and 39: handmade construction can be easily
- Page 40: animal is returning to the top, the
- Page 43 and 44: 363.2.1-S Counterpoise LiftThe coun
- Page 45 and 46: 38to return the lever. Combinations
- Page 47 and 48: 40Table 3.1Shadouf performanceLift
- Page 49 and 50: (b)Figure 3.5 Scoop (a) used as sho
- Page 51 and 52: ‘PIVOT-r- ----hFigure 3.6 Wzcer b
- Page 53 and 54: 46water. The capacity of this devic
- Page 55 and 56: - =7?=PIVOTCOUNTER WEIGHT\FLAP- VAL
- Page 57 and 58: 50(a)ROLLER 7- HAND RAIL/SIDE - BY-
- Page 59 and 60: 52flow in through a check-valve (e.
- Page 61 and 62: 54exhaust valves for the steam (or
- Page 63 and 64: 56Another significant difference be
- Page 65 and 66: 58shaft), two other forms of these
- Page 67 and 68: 60Among the simplest designs for a
- Page 69: 62/HANDLEBARDISCHARGEHOSEfFOOTRE$TD
- Page 73 and 74: 663.3.1 WheelAfter many of the earl
- Page 75 and 76: 68Table 3.2 Manually-operated paddl
- Page 77 and 78: 70engine (2-3 hp) as the prime move
- Page 79 and 80: 72Table 3.3 records some of the per
- Page 81 and 82: 74Several names which are also appl
- Page 83 and 84: 76Table 3.5Zawafa performanceLiftDi
- Page 85 and 86: 78noria and the discharge and head
- Page 87 and 88: 80enclosed circumference can also b
- Page 89 and 90: 82Most early tympanums were of the
- Page 91 and 92: 84Table 3.6Tympanum performanceDiam
- Page 93 and 94: 86sufficiently compact and lightwei
- Page 95 and 96: 88of 3000 gpm or 5000 psig. Dependi
- Page 97 and 98: SE;vlI - ROTARYBUCKET VANEU’C)Fig
- Page 99 and 100: 92(a)AIRCHAMBERAIR FEEDERVALVEWASTE
- Page 101 and 102: 94Table 3.8Ram performanceA. Typica
- Page 103 and 104: COMPRESSEDAIRDEAofpctI5LT1EDUCTC II
- Page 105 and 106: 98FLASHTANK .iJI 10 -NON-RETURNVALV
- Page 107 and 108: Because the components are not yet
- Page 109 and 110: 102air-lift pumps. The oscillation
- Page 111 and 112: 104and from the impeller and confin
- Page 113 and 114: 106making this type pump useful for
- Page 115 and 116: 90s; 80iTi!g 700E 60W50SPECIFIC SPE
- Page 117 and 118: 110to lubricate all or some of thei
- Page 119 and 120: 112such variables as impeller size,
HANDLE/CONNECTINGARMDISCHARGEFLAP VALVE/ nDIAPHRAGMIINLET FLAPVALVEUCTION LINECONNECTIONFigure 3.16 Diaphragm pump with handle-lever for manual operation
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